The 22-2 has a developmental history that can be traced back to 1925. The weapon was designed by Heinrich von Wimmersperg and originally marketed as the Venus 22-2 by The Venus Corporation based in Utica, Michigan.
Production of the weapon later moved to Colombia due to a lack of demand in the United States, with the weapon now being marketed as the S.A. Policarpa Saturn 22-2; the weapon was produced in small numbers and apparently used by clandestine forces in some numbers.
Clones of the 22-2 are believed to have been produced in Mexico.
The 22-2 is a double-barreled machine pistol which uses the principle of blowback to fire its rounds. The weapon's bolt has two firing pins. The weapon has a very high rate of fire of about 5000 RPM.
It is said that "a rare an unusual suppressor" can be used with the weapon, but this is unconfirmed. The weapon appears to have provisions for fully-automatic fire only, with the switch on the right of the weapon appearing to act as a safety.